204231257 has 4 divisors (see below), whose sum is σ = 205108020. Its totient is φ = 203354496.

The previous prime is 204231239. The next prime is 204231259. The reversal of 204231257 is 752132402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 138556441 + 65674816 = 11771^2 + 8104^2 .

It is a cyclic number.

It is not a de Polignac number, because 204231257 - 2¹⁰ = 204230233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204231259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438032 + ... + 438497.

It is an arithmetic number, because the mean of its divisors is an integer number (51277005).

Almost surely, 2^204231257 is an apocalyptic number.

It is an amenable number.

204231257 is a deficient number, since it is larger than the sum of its proper divisors (876763).

204231257 is an equidigital number, since it uses as much as digits as its factorization.

204231257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876762.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 204231257 is about 14290.9501783471. The cubic root of 204231257 is about 588.8988914259.

Adding to 204231257 its reverse (752132402), we get a palindrome (956363659).

The spelling of 204231257 in words is "two hundred four million, two hundred thirty-one thousand, two hundred fifty-seven".